Accepted Answer

Umbra hits pretty hard, so investing in a strong one-handed enchanted sword and a shield to block/mitigate a portion of the damage she deals is a good idea. Also, its useful to have high agility, as her attacks a lot of the time cause you to stagger then she can easily finish you off with a few more strikes. Use damage strength and endurance poisons to weaken her significantly. Just stock up on poisons and healing/fortifying potions and she'll fall in no time.

If you really have trouble with her, you could always cast a frenzy spell on her and let her chase you to the Imperial City so the guards can finish her off. (Don't attack her and then run to the Imperial City, as you'll get arrested for assaulting her since she isn't a normally hostile character).

i used an elven longsword, and had no problem taking her health down quick. and i wore the orcish armor set. also the Wizard's Fury Spell is a beginner spell that does major damge. finish the mages guild to aquire it for free of charge (or mabye for your labor in helping the mages) >_< <TEE HEE HEE}